<template>
  <el-breadcrumb class="app-breadcrumb" separator="/">
    <transition-group name="breadcrumb">
      <el-breadcrumb-item v-for="(item,index) in obj.levelList" :key="item.path">
        <span v-if="item.redirect==='noRedirect'||index==obj.levelList.length-1" class="no-redirect">{{ item.meta.title }}</span>
        <a v-else @click.prevent="handleLink(item)">{{ item.meta.title }}</a>
      </el-breadcrumb-item>
    </transition-group>
  </el-breadcrumb>
</template>

<script lang="ts" setup>
  import pathToRegexp from 'path-to-regexp'
  import {onMounted, reactive, watch} from "vue";
  import {useRoute} from 'vue-router'

  const obj = reactive({levelList:{}})
  const route = useRoute()

  // 获取面包屑
  const getBreadcrumb = ()=>{
    let matched = route.matched.filter(item => item.meta && item.meta.title)
    const first = matched[0]
    obj.levelList = matched.filter(item => item.meta && item.meta.title && item.meta.breadcrumb !== false)
  }
  onMounted(()=>{
    getBreadcrumb()
    watch(route,()=>{
      if (route.path.startsWith('/redirect/')) {
        return
      }
      getBreadcrumb()
    })
  })
</script>

<style lang="scss" scoped>
.app-breadcrumb.el-breadcrumb {
  margin-left: 10px;
  display: inline-block;
  font-size: 14px;
  margin-bottom: 4px;
  .no-redirect {
    cursor: text;
  }
}
</style>
